Electric-arc lamp.



No. 762,503. PATENTED JUNE 14, 1904.

G. SZUK & W. HAGKL.

ELECTRIC ARC LAMP.

APPLICATION FILED JUNE 3,1903.

no MODEL.

Zara/2 Zors 101,? 11 esses mzwbmm PEYERS co. PMOTO-LITNG, wAsKmGYON. u. ::v

UNITED STATES Iatented June 14, 1904.

PATENT OFFICE.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 762,503, dated June 14, 1904.

Application filed June 3, 1903. Serial No. 159,934. (No model.)

.plify the mechanism of the lamp as a whole and in particular to replace the usual clock or motor work for feeding or regulating the carbons by extremely simple mechanism, whereby not only is the lamp rendered free from all complications, but the consumption of the carbons greatly economized.

Our invention is illustrated by the accompanying drawings, in which- Figure 1 shows a vertical section through the entire lamp, the central portion being broken away to save space in the drawing.

Figs. 2, 3, and 4: are detail views of parts to be hereinafter referred to.

The base-plate 1 has a cylindrical prolongation 2, to which is hinged the disk 3 for guiding the positive carbon. Above this plate 3 is a removable clutch-plate 4, made of nonconducting material and sliding loosely within the cylindrical part 2. The disk 4 is shown in plan view in Fig. 4:. It is provided witha central hole of sutficient diameter to receive the positive-carbon rod. This hole is countersunk above, so as to enable the carbon to readily return. This is a point of much importance in cases where the lamp is started again shortly after being cut out and the incandescent carbons ignite the explosive gaseous mixture formed in the glass globe, so that the upper carbon is frequently violently propelled in upward direction.

The metal disk 3 is secured to the wall of the cylinder 2 by a hinge 5. The opposite side of the disk 3 is connected to the tubular armature 7 by means of a rod 6 without lever action. Fig. 3 by part sectional view shows the armature 7 separately.

The cylinder 2 is surmounted by a casing 8, at the top of which is located the magnetic plug 9, the under side of which is conically shaped. The tubular armature 7 is provided with a corresponding conical recess, whereby the pull in the case of long lifts is increased.

The solenoid 10 is inserted directly over the casing 8, which, as already stated, carries the stationary plug 9 above and is secured below to the cylindrical part 2 of the base 1. The solenoid 10 is adjustably arranged on the easing 8, so as to admit of regulation. The bottom of the solenoid 10 carries a lever mechanism attached to a dash-pot 11.

\Vithin the casing 8 is located the tube 12, which may be of triangular, square, or any other desired cross-section. This tube acts as guide for the upper-carbon holder 13 and is insulated at either end from the casing 8, so that all external metallic parts of the lamp carry no current when the latter is in operation. This comlucting-tube 1 2, by reason of the cross-section selected for it, prevents the carbon-holder from turning on its axis. The upper-carbon holder 13 is of such shape as to fit the tube 12 and receives the positive carbon. Fig. 2 is a part sectional view showing the top part of the holder 13 alone. It will be seen that the latter carries a plate 1 1, adapted to fit into the tube 12 and made of insulating refractory material. This plate let forms the actual guide for the carbon-holder in the tube 12.

The current is conducted by a cable consisting of a number of line wires, which to prevent crossing or twisting is wound round a spindle 17 on the top of the plate 14. The negative-carbon holder consists of the stirrup 16, suitably insulated from the plate 1, to the under side of which it is attached.

The air-tight combustion-chamber for the carbons is formed by a glass globe carried by the plate 1 in any suitable manner. Only so much air can enter at the upper carbon as is absolutely necessary to insure proper combustion of the carbons.

The operation of the lamp is as follows: lVhen cut out, the points of the carbons are in contact, since the armature 7 is in its lowest position. The disk 3, connected to the armature by the rod 6, and likewise the disk 1 accordingly occupy a horizontal position, so that no action is exerted upon the upper carbon, and the latter thus rests upon the lower by reason of its own weight. On the lamp being cut in the current flows through the solenoid and thence through a cable to the upper-carbon holder, and thus to the positive, carbon. From the latter the current passes through the lower carbon, through the insulated stirrup 16, through an insulated conductor to the second terminal at the top of the lamp. The cable which conducts the current to the upper carbon-holder has a second branch leading to the tube 12. Owing to the solenoid becoming excited, the armature 7 will be attracted, whereby the hinged plate 3, connected by the rod 6 to the armature, will be raised, so bringing the clutch-plate 4, which rests upon it, into an inclined position, so that the carbon will be seized or jammed and owing to the upward pull will be raised, whereby the electric arc is formed Asthe carbon gradually burns away the are will increase and the armature 7, by reason of the diminished strength of the solenoid, will descend from the latter,whereupon the hinged disk 3 and clutchplate 4 will likewise fall. The latter will thus gradually approach the horizontal position which admits of minimum sliding of the carloon.

The lamp above described is constructed for direct current, but can be employed without reconstruction also for alternating currents if in place of the solenoid a suitably-constructed electromagnet is used, so that the shocks due to the alternations may be overcome. The lamp can also be constructed as differential or as shunt-lamp.

What we claim, and desire to secure by Letters Patent, is-

1. In electric-are lamps, mechanism for feeding and regulating the carbons, comprising a solenoid, a core for the same, a plate, perforated to receive the upper carbon,hinged to a lower part of the lamp, and connected to the said solenoid-core, a sliding clutch-plate of insulating, refractory material resting on said hinged plate and bored concentrically with the axis of the carbon, in such manner that when the solenoid attracts its core the clutch seizes and lifts the carbon, substantially as described.

2. In electric are lamps, mechanism for feeding and regulating the carbons, comprising a solenoid, a core for the same, a plate,

perforated to receive the upper carbon, hinged to a lower part of the lamp, and connected to the said solenoid-core, a sliding clutch-plate of insulating, refractory material resting on said hinged plate and having aconically-countersunk hole bored concentrically with the axis of the carbon, all substantially as described.

3. In electric arc lamps, mechanism for feeding and regulating the carbons, comprising a solenoid, a core for the same, a holder for the upper carbon, a tube in which the holder slides, of such cross-section that rotary motion of the same is prevented, a plate perforated to receive the upper carbon, hinged to a lower part of the lamp, and connected to the solenoid core, and a sliding clutch -plate of insulating refractory material resting on said hinged plate and bored concentrically with the axis of the carbon, all substantially as described.

L. In electric are lamps, mechanism for feeding and regulating the carbons, comprising a vertically-adjustable solenoid, a core for the same, a double-armed lever pivoted to the said core, one arm of which lever is connected to the solenoid-box while the other arm carries the piston of a dash-pot, a holder for the upper carbon, a tube in which the latter slides, of such cross-section that rotary motion of the holder is prevented, a plate perforated to receive the upper carbon hinged to a lower part of the lamp and connected to the solenoid-core, a sliding clutch-plate of insulating refractory material resting on said hinged plate and bored concentrically with the axis of the carbon, all substantially as described.

5. In electric are lamps, mechanism for feeding and regulating the carbons, comprising a vertically-adjustable solenoid, a core for the same, a double-armed lever pivoted to the said core, one arm of which lever is connected to the solenoid-box while the other arm carries the piston of a dash-pot, a holder for the upper carbon, a tube in which the latter slides, insulated at both ends from the other parts of the lamp, and of such cross section that rotary motion of the holder is prevented, a plate perforated to receive the upper carbon hinged to a lower part of the lamp and connected to the solenoid-core, a sliding clutch-plate of insulating refractory material resting on said hinged plate and bored concentrically with the axis of the carbon, all substantially as described.

6. In electric are lamps, mechanism for feeding and regulating the carbons, compris ing a solenoid, a core for the same, a holder for the upper carbon having a member of insulating and refractory material carrying a spindle, a tube of cross-section corresponding to the form of said insulating and refractory member, which slides within it and prevents rotary motion of the carbon-holder, a plate perforated to receive the upper carbon, hinged to a lower part of the lamp and connected to the solenoid-core and a sliding clutch-plate of insulating, refractory material resting on said hinged plate and bored concentrically with the axis of the carbon, all substantially as described.

In testimony that we claim the foregoing as our invention. we have signed our names in presence of two subscribing witnesses.

GEZA SZUK. VVENZEL HACKL. 'Witnesses:

ALFRED BRUNN, LOUIS VliNDORN. 

